I have power starved my Improbability Drive with a Dwarfcraft Power Struggle and it gets weird. The ID is so strange and so different sounding with just the slightest turn of a knob you go from fuzz to tremolo to ring modish sounding and power starved it just gets crazy. I REALLY would love a AC Power Struggle to use with my Metasonix gear cause I was getting some pretty nasty stuff power starving tubes...until I blew the pot on it!